It covers 657.59 square kilometres (253.90 sq mi)[1] Tong'an District has a population of 855,920 residents.

[1] Tong'an District is also attracting foreign investment because of its status as a designated special economic zone in Xiamen.

The Xixi starts in the Zhaijianwei Mountains (寨尖尾山 Zhàijiānwěishān) in the northwestern part of Tong'an District, and flows in the general south-eastern direction.

A number of large bridges have been constructed across the Xixi estuary, carrying roads and a railway between Tong'an and Xiang'an Districts (and, viewed on a larger scale, between Xiamen and Quanzhou).

It is covered in natural resources such as granite, kaolin earth, mineral water and hot springs.

The main agricultural products from Tong'an District are prawns, peanuts, longan, and pigs, fruits, vegetables, tea and herbs.

[4] Tong'an district is at the economic crossroad between Xiamen, Quanzhou and Zhangzhou prefecture level cities.